Developing-rack



UNITED STATES PATENT OFFIGE.

FREDERICK W. BARNES, OF ROCHESTER, NEW YORK, ASSIGNOR- TO EASTMAN KODAKCOMPANY, OF ROCHESTER, NEW YORK. A CORPORATION OF NEW YORK.

DEVELOPING-RACK.

Application filed January 11, 1919.

'1 b all whom 2'25 may concern Be it known that I, FREDERICK l/V.BARNES, a citizen of the United States of America, residing atRochester, in the county of Monroe and State of New York, have inventedcertain new and useful Improvements in Developing-Racks, of which thefollowing is full, clear, and exact spec1fication.

My present invention relates to photographic apparatus and moreparticularly to holders for out film sheets during development, fixing,washing and drying, or such other treatments as may be desired, and itsobject is to provide a simple, light and efficient holding frame tomaintain them flat during the operations mentioned.

Reference is made to the accompanying drawings in which:

Figure 1 is a perspective view of a film rack with the film positionedtherein;

Fig. 2 is a perspective view of the inner frame;

Fig. 3 is a fragmentary section showing only one side bar of the rackand frame with a film clamped therein;

Fig. 1 is a similar section on the line 4t4 of Fig. 2;

Fig. 5 is a fragmentary view showing a clamp struck up from the body ofthe material, forming the inner frame;

Fig. 6 is a similar view showing a clamp made from a separate piece ofmaterial.

In all of the figures the same reference characters indicate the sameparts.

The rack comprises two frames, the outer frame having a crossbar 1 theends of which extend beyond the edges of the fame to form a suspendingmeans, whereby the rack as a whole may be supported in a'suitable tank.From this bar two side bars 2 extend downwardly. These have overhangingflanges 3 extending fromthe bottom nearly to the top. A lower cross-bar42 connects the bottom ends of these two side bars. This outer frame issubstantially the same as that disclosed in the patent to Grubman, No.1,019,320, issued March 5, 1912, and one of the objects of my inventionis to provide a second frame to be used with this frame, so that theowners of frames of this type may employ them for the development bothof plates and cut films.

The second or inner frame is rectangu Specification of Letters Patent.

Patented May at, 19.20.

Serial No. 270,740.

lar in shape and comprises a top crossbar 5 having a manipulating handle(5, a bot tom crossbar 16, which may have apertures 17 therein, and sidebars 7 with overhang ing flanges S. Struck from the material of theseoverhanging fianges are resilient clamps 9 terminating in inwardlyfacing jaws 10 which may have points 12 thereon to engage the film 11and press it against bar 7 1 which suit-able apertures 13 may be made toaccommodate the points of the jaws. If desired, as shown in Fig. (3, thematerial of this spring may be made of a separate piece of metal 9having a bent jaw 10, in which case an aperture 14. is made in flange 8.The separate piece of material is attached to the flange by rivets 15.This permits the use of resilient material of better quality than therest of the frame for the spring jaws.

In operation, the inner frame is laid flat upon any suitable surface andthe film slid into the frame until its edge contacts with the bar 16.The inner frame, as a whole, is then slid into the grooved outer frame,and the rigid walls of the side bars of this outer frame will force theresilient arms 9 in wardly and cause the points 12 of the clamps toengage the film 11 as the inner frame is slid into place. When. the bar16 contacts with the bar 4, the film will be securely held in positionand the rack as a whole will then be placed in a suitable developingtank and the usual operations performed upon it.

lVhile I have shown a specific embodiment of my invention, it will beunderstood that I contemplate in the construction thereof changes, suchas the particular shape and location of the clamps and any othermodifications falling within the scope of the following claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. A frame consisting of end bars and side bars, the latter havinginwardly turned grooves, resilient clasping jaws mounted on one wall ofthe grooves and adapted to clamp sheet material against the other wallof the groove.

2. A frame consisting of end bars and side bars, the latter havinginwardly turned grooves, each of said side bars carrying a. clasping jawhaving a resilient support extending lengthwise of said side bars, and.means slidably related to the side bans adapted to actuate and tomaintain in gripping position said jaws.

3. A rack for supporting a. sheet of lienible material, comprising 2Lframe, clamps on the sides of the frame, and a second frame havinggrooved sides, the grooved sides of the second frame being adapted toembrace and operate the clamps of the first frame, whereby they may gripthe edges of 1, liexihle sheet.

4:. A rack for supporting a sheet of flex ible plmtographie materiel,comp-rising e rectangular frame, sii ies of which are flanged, resilientclasping jaws on the flanged sides, and a second rectangular framehaving grooved sides in which the tirst frame fits, the grooved sides ofthe second frame embracing the grooved sides of the first frame andoperating the jaws.

A rack for supportii'ig a sheet of tie):- ible material, comprising aframe with grooved sides, the grooves being open at one end, a secondframe with clamps on it, the second frame fitting within said groovesand adapted to he slid therein through the open end thereof, the wallsof the groove when thus embracing the second frame op crating theclamps, whereby they may grip the edges of a. flexible sheet.

6. A reel: for supporting a sheet of materizil, comprising a :lraniehaving means by which it may be SUSPClltlL-il. and sides with inwardlyfacing grooves, and Lt second frame it lapted to lit within the groovedsides, the second frame having side grooves within which the edges of eflexible sheet may be laid, and saring jaws to 'grip such edges, the awsbeing held in gri p ping position by the lirst named frame.

7. i rack for supportii sheets oi? flexible photo nphic meta 'il, (:0ipriaing a iranie having suspending means, and parallel. sides withinwardly facing grooves. the grooves being open at one one, and n.seco'i'id frame having parallel sides with inwardly facing grooves, andresilient 1i aws mounted on one wall of such grooves and ai'lapteil topro iigainst the other wall, the second 1 it ting within and adapted tobe the grooves of the first frame through the open ends thereof, wherebythe jaus will he held in gripping position.

Signed at Rochester, Yew York, this 6th day of January, 191.9.

FREDEl-UOK W. Bel-ti? NH.

